Mercurial > hg > truffle
annotate src/share/vm/classfile/dictionary.hpp @ 12316:190899198332
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Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com
| author | hseigel |
|---|---|
| date | Thu, 26 Sep 2013 10:25:02 -0400 |
| parents | 43083e670adf |
| children | aa6f2ea19d8f |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CLASSFILE_DICTIONARY_HPP |
| 26 #define SHARE_VM_CLASSFILE_DICTIONARY_HPP | |
| 27 | |
| 28 #include "classfile/systemDictionary.hpp" | |
| 29 #include "oops/instanceKlass.hpp" | |
| 30 #include "oops/oop.hpp" | |
| 31 #include "utilities/hashtable.hpp" | |
| 32 | |
| 0 | 33 class DictionaryEntry; |
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34 class PSPromotionManager; |
| 0 | 35 |
| 36 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
| 37 // The data structure for the system dictionary (and the shared system | |
| 38 // dictionary). | |
| 39 | |
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40 class Dictionary : public TwoOopHashtable<Klass*, mtClass> { |
| 0 | 41 friend class VMStructs; |
| 42 private: | |
| 43 // current iteration index. | |
| 44 static int _current_class_index; | |
| 45 // pointer to the current hash table entry. | |
| 46 static DictionaryEntry* _current_class_entry; | |
| 47 | |
| 48 DictionaryEntry* get_entry(int index, unsigned int hash, | |
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49 Symbol* name, ClassLoaderData* loader_data); |
| 0 | 50 |
| 51 DictionaryEntry* bucket(int i) { | |
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52 return (DictionaryEntry*)Hashtable<Klass*, mtClass>::bucket(i); |
| 0 | 53 } |
| 54 | |
| 55 // The following method is not MT-safe and must be done under lock. | |
| 56 DictionaryEntry** bucket_addr(int i) { | |
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57 return (DictionaryEntry**)Hashtable<Klass*, mtClass>::bucket_addr(i); |
| 0 | 58 } |
| 59 | |
| 60 void add_entry(int index, DictionaryEntry* new_entry) { | |
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61 Hashtable<Klass*, mtClass>::add_entry(index, (HashtableEntry<Klass*, mtClass>*)new_entry); |
| 0 | 62 } |
| 63 | |
| 64 public: | |
| 65 Dictionary(int table_size); | |
| 6197 | 66 Dictionary(int table_size, HashtableBucket<mtClass>* t, int number_of_entries); |
| 0 | 67 |
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68 DictionaryEntry* new_entry(unsigned int hash, Klass* klass, ClassLoaderData* loader_data); |
| 0 | 69 |
| 70 DictionaryEntry* new_entry(); | |
| 71 | |
| 72 void free_entry(DictionaryEntry* entry); | |
| 73 | |
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74 void add_klass(Symbol* class_name, ClassLoaderData* loader_data,KlassHandle obj); |
| 0 | 75 |
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76 Klass* find_class(int index, unsigned int hash, |
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77 Symbol* name, ClassLoaderData* loader_data); |
| 0 | 78 |
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79 Klass* find_shared_class(int index, unsigned int hash, Symbol* name); |
| 0 | 80 |
| 81 // Compiler support | |
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82 Klass* try_get_next_class(); |
| 0 | 83 |
| 84 // GC support | |
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85 void oops_do(OopClosure* f); |
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86 void always_strong_oops_do(OopClosure* blk); |
| 0 | 87 |
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88 void always_strong_classes_do(KlassClosure* closure); |
| 0 | 89 |
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90 void classes_do(void f(Klass*)); |
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91 void classes_do(void f(Klass*, TRAPS), TRAPS); |
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92 void classes_do(void f(Klass*, ClassLoaderData*)); |
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93 |
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94 void methods_do(void f(Method*)); |
| 0 | 95 |
| 96 | |
| 97 // Classes loaded by the bootstrap loader are always strongly reachable. | |
| 98 // If we're not doing class unloading, all classes are strongly reachable. | |
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99 static bool is_strongly_reachable(ClassLoaderData* loader_data, Klass* klass) { |
| 0 | 100 assert (klass != NULL, "should have non-null klass"); |
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101 return (loader_data->is_the_null_class_loader_data() || !ClassUnloading); |
| 0 | 102 } |
| 103 | |
| 104 // Unload (that is, break root links to) all unmarked classes and | |
| 105 // loaders. Returns "true" iff something was unloaded. | |
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106 bool do_unloading(); |
| 0 | 107 |
| 108 // Protection domains | |
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109 Klass* find(int index, unsigned int hash, Symbol* name, |
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110 ClassLoaderData* loader_data, Handle protection_domain, TRAPS); |
| 0 | 111 bool is_valid_protection_domain(int index, unsigned int hash, |
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112 Symbol* name, ClassLoaderData* loader_data, |
| 0 | 113 Handle protection_domain); |
| 114 void add_protection_domain(int index, unsigned int hash, | |
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115 instanceKlassHandle klass, ClassLoaderData* loader_data, |
| 0 | 116 Handle protection_domain, TRAPS); |
| 117 | |
| 118 // Sharing support | |
| 119 void reorder_dictionary(); | |
| 120 | |
| 121 | |
| 122 #ifndef PRODUCT | |
| 123 void print(); | |
| 124 #endif | |
| 125 void verify(); | |
| 126 }; | |
| 127 | |
| 128 // The following classes can be in dictionary.cpp, but we need these | |
| 129 // to be in header file so that SA's vmStructs can access. | |
| 130 | |
| 6197 | 131 class ProtectionDomainEntry :public CHeapObj<mtClass> { |
| 0 | 132 friend class VMStructs; |
| 133 public: | |
| 134 ProtectionDomainEntry* _next; | |
| 135 oop _protection_domain; | |
| 136 | |
| 137 ProtectionDomainEntry(oop protection_domain, ProtectionDomainEntry* next) { | |
| 138 _protection_domain = protection_domain; | |
| 139 _next = next; | |
| 140 } | |
| 141 | |
| 142 ProtectionDomainEntry* next() { return _next; } | |
| 143 oop protection_domain() { return _protection_domain; } | |
| 144 }; | |
| 145 | |
| 146 // An entry in the system dictionary, this describes a class as | |
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147 // { Klass*, loader, protection_domain }. |
| 0 | 148 |
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149 class DictionaryEntry : public HashtableEntry<Klass*, mtClass> { |
| 0 | 150 friend class VMStructs; |
| 151 private: | |
| 152 // Contains the set of approved protection domains that can access | |
| 153 // this system dictionary entry. | |
| 154 ProtectionDomainEntry* _pd_set; | |
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155 ClassLoaderData* _loader_data; |
| 0 | 156 |
| 157 public: | |
| 158 // Tells whether a protection is in the approved set. | |
| 159 bool contains_protection_domain(oop protection_domain) const; | |
| 160 // Adds a protection domain to the approved set. | |
| 161 void add_protection_domain(oop protection_domain); | |
| 162 | |
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163 Klass* klass() const { return (Klass*)literal(); } |
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164 Klass** klass_addr() { return (Klass**)literal_addr(); } |
| 0 | 165 |
| 166 DictionaryEntry* next() const { | |
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167 return (DictionaryEntry*)HashtableEntry<Klass*, mtClass>::next(); |
| 0 | 168 } |
| 169 | |
| 170 DictionaryEntry** next_addr() { | |
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171 return (DictionaryEntry**)HashtableEntry<Klass*, mtClass>::next_addr(); |
| 0 | 172 } |
| 173 | |
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174 ClassLoaderData* loader_data() const { return _loader_data; } |
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175 void set_loader_data(ClassLoaderData* loader_data) { _loader_data = loader_data; } |
| 0 | 176 |
| 177 ProtectionDomainEntry* pd_set() const { return _pd_set; } | |
| 178 void set_pd_set(ProtectionDomainEntry* pd_set) { _pd_set = pd_set; } | |
| 179 | |
| 180 bool has_protection_domain() { return _pd_set != NULL; } | |
| 181 | |
| 182 // Tells whether the initiating class' protection can access the this _klass | |
| 183 bool is_valid_protection_domain(Handle protection_domain) { | |
| 184 if (!ProtectionDomainVerification) return true; | |
| 185 if (!SystemDictionary::has_checkPackageAccess()) return true; | |
| 186 | |
| 187 return protection_domain() == NULL | |
| 188 ? true | |
| 189 : contains_protection_domain(protection_domain()); | |
| 190 } | |
| 191 | |
| 192 | |
| 193 void protection_domain_set_oops_do(OopClosure* f) { | |
| 194 for (ProtectionDomainEntry* current = _pd_set; | |
| 195 current != NULL; | |
| 196 current = current->_next) { | |
| 197 f->do_oop(&(current->_protection_domain)); | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 void verify_protection_domain_set() { | |
| 202 for (ProtectionDomainEntry* current = _pd_set; | |
| 203 current != NULL; | |
| 204 current = current->_next) { | |
| 205 current->_protection_domain->verify(); | |
| 206 } | |
| 207 } | |
| 208 | |
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209 bool equals(Symbol* class_name, ClassLoaderData* loader_data) const { |
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210 Klass* klass = (Klass*)literal(); |
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211 return (InstanceKlass::cast(klass)->name() == class_name && |
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212 _loader_data == loader_data); |
| 0 | 213 } |
| 214 | |
| 215 void print() { | |
| 216 int count = 0; | |
| 217 for (ProtectionDomainEntry* current = _pd_set; | |
| 218 current != NULL; | |
| 219 current = current->_next) { | |
| 220 count++; | |
| 221 } | |
| 222 tty->print_cr("pd set = #%d", count); | |
| 223 } | |
| 224 }; | |
| 710 | 225 |
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226 // Entry in a SymbolPropertyTable, mapping a single Symbol* |
| 710 | 227 // to a managed and an unmanaged pointer. |
| 6197 | 228 class SymbolPropertyEntry : public HashtableEntry<Symbol*, mtSymbol> { |
| 710 | 229 friend class VMStructs; |
| 230 private: | |
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231 intptr_t _symbol_mode; // secondary key |
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232 Method* _method; |
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233 oop _method_type; |
| 710 | 234 |
| 235 public: | |
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236 Symbol* symbol() const { return literal(); } |
| 710 | 237 |
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238 intptr_t symbol_mode() const { return _symbol_mode; } |
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239 void set_symbol_mode(intptr_t m) { _symbol_mode = m; } |
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240 |
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241 Method* method() const { return _method; } |
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242 void set_method(Method* p) { _method = p; } |
| 710 | 243 |
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244 oop method_type() const { return _method_type; } |
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245 oop* method_type_addr() { return &_method_type; } |
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246 void set_method_type(oop p) { _method_type = p; } |
| 710 | 247 |
| 248 SymbolPropertyEntry* next() const { | |
| 6197 | 249 return (SymbolPropertyEntry*)HashtableEntry<Symbol*, mtSymbol>::next(); |
| 710 | 250 } |
| 251 | |
| 252 SymbolPropertyEntry** next_addr() { | |
| 6197 | 253 return (SymbolPropertyEntry**)HashtableEntry<Symbol*, mtSymbol>::next_addr(); |
| 710 | 254 } |
| 255 | |
| 256 void print_on(outputStream* st) const { | |
| 257 symbol()->print_value_on(st); | |
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258 st->print("/mode="INTX_FORMAT, symbol_mode()); |
| 710 | 259 st->print(" -> "); |
| 260 bool printed = false; | |
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261 if (method() != NULL) { |
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262 method()->print_value_on(st); |
| 710 | 263 printed = true; |
| 264 } | |
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265 if (method_type() != NULL) { |
| 710 | 266 if (printed) st->print(" and "); |
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267 st->print(INTPTR_FORMAT, (void *)method_type()); |
| 710 | 268 printed = true; |
| 269 } | |
| 270 st->print_cr(printed ? "" : "(empty)"); | |
| 271 } | |
| 272 }; | |
| 273 | |
| 274 // A system-internal mapping of symbols to pointers, both managed | |
| 275 // and unmanaged. Used to record the auto-generation of each method | |
| 276 // MethodHandle.invoke(S)T, for all signatures (S)T. | |
| 6197 | 277 class SymbolPropertyTable : public Hashtable<Symbol*, mtSymbol> { |
| 710 | 278 friend class VMStructs; |
| 279 private: | |
| 280 SymbolPropertyEntry* bucket(int i) { | |
| 6197 | 281 return (SymbolPropertyEntry*) Hashtable<Symbol*, mtSymbol>::bucket(i); |
| 710 | 282 } |
| 283 | |
| 284 // The following method is not MT-safe and must be done under lock. | |
| 285 SymbolPropertyEntry** bucket_addr(int i) { | |
| 6197 | 286 return (SymbolPropertyEntry**) Hashtable<Symbol*, mtSymbol>::bucket_addr(i); |
| 710 | 287 } |
| 288 | |
| 289 void add_entry(int index, SymbolPropertyEntry* new_entry) { | |
| 290 ShouldNotReachHere(); | |
| 291 } | |
| 292 void set_entry(int index, SymbolPropertyEntry* new_entry) { | |
| 293 ShouldNotReachHere(); | |
| 294 } | |
| 295 | |
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296 SymbolPropertyEntry* new_entry(unsigned int hash, Symbol* symbol, intptr_t symbol_mode) { |
| 6197 | 297 SymbolPropertyEntry* entry = (SymbolPropertyEntry*) Hashtable<Symbol*, mtSymbol>::new_entry(hash, symbol); |
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298 // Hashtable with Symbol* literal must increment and decrement refcount. |
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299 symbol->increment_refcount(); |
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300 entry->set_symbol_mode(symbol_mode); |
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301 entry->set_method(NULL); |
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302 entry->set_method_type(NULL); |
| 710 | 303 return entry; |
| 304 } | |
| 305 | |
| 306 public: | |
| 307 SymbolPropertyTable(int table_size); | |
| 6197 | 308 SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, int number_of_entries); |
| 710 | 309 |
| 310 void free_entry(SymbolPropertyEntry* entry) { | |
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311 // decrement Symbol refcount here because hashtable doesn't. |
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312 entry->literal()->decrement_refcount(); |
| 6197 | 313 Hashtable<Symbol*, mtSymbol>::free_entry(entry); |
| 710 | 314 } |
| 315 | |
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316 unsigned int compute_hash(Symbol* sym, intptr_t symbol_mode) { |
| 710 | 317 // Use the regular identity_hash. |
| 6197 | 318 return Hashtable<Symbol*, mtSymbol>::compute_hash(sym) ^ symbol_mode; |
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319 } |
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320 |
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321 int index_for(Symbol* name, intptr_t symbol_mode) { |
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322 return hash_to_index(compute_hash(name, symbol_mode)); |
| 710 | 323 } |
| 324 | |
| 325 // need not be locked; no state change | |
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326 SymbolPropertyEntry* find_entry(int index, unsigned int hash, Symbol* name, intptr_t name_mode); |
| 710 | 327 |
| 328 // must be done under SystemDictionary_lock | |
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329 SymbolPropertyEntry* add_entry(int index, unsigned int hash, Symbol* name, intptr_t name_mode); |
| 710 | 330 |
| 331 // GC support | |
| 332 void oops_do(OopClosure* f); | |
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333 |
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334 void methods_do(void f(Method*)); |
| 710 | 335 |
| 336 // Sharing support | |
| 337 void reorder_dictionary(); | |
| 338 | |
| 339 #ifndef PRODUCT | |
| 340 void print(); | |
| 341 #endif | |
| 342 void verify(); | |
| 343 }; | |
| 1972 | 344 #endif // SHARE_VM_CLASSFILE_DICTIONARY_HPP |